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Effects of 2,4-Dichlorophenol on the Net-Spinning Behavior of Hydropsyche slossonae Larvae (Trichoptera; Hydropsychidae), an Early Warning Signal of Chronic Toxicity

Tessier, L; Biosvert, JL; Vought, Lena LU and Lacoursière, Jean LU (2000) In Ecotoxicology and Environmental Safety 46(2). p.207-217
Abstract
In order to assess the potential of hydropsychid capture net anomalies as a bioindicator of chronic toxicity in streams and rivers, the effects of 2,4-dichlorophenol (2,4-DCP) exposure on the net-spinning behavior of Hydropsyche slossonae were examined for anomalies after 0, 5, 10, 15, and 20 exposure days to gradient concentration of 2,4-dichlorophenol. The net-spinning behavior was significantly affected when larvae were exposed to 1.0, 10, 25, and 50 μg·L−1, as expressed by the occurrence of two distinct abnormalities. The first one was a distortion of the midline meshes, where the normal diamond-shape structure is disrupted and the meshes are separated by extra strands (called "midline" anomaly). The second aberration observed was... (More)
In order to assess the potential of hydropsychid capture net anomalies as a bioindicator of chronic toxicity in streams and rivers, the effects of 2,4-dichlorophenol (2,4-DCP) exposure on the net-spinning behavior of Hydropsyche slossonae were examined for anomalies after 0, 5, 10, 15, and 20 exposure days to gradient concentration of 2,4-dichlorophenol. The net-spinning behavior was significantly affected when larvae were exposed to 1.0, 10, 25, and 50 μg·L−1, as expressed by the occurrence of two distinct abnormalities. The first one was a distortion of the midline meshes, where the normal diamond-shape structure is disrupted and the meshes are separated by extra strands (called "midline" anomaly). The second aberration observed was called "chaotic" net, where the nets are highly irregular without any real structure or well-defined areas. A good correlation was found between the chaotic net frequencies and the reduction of ATP concentrations in the larvae, indicating possible uncoupling effects of 2,4-DCP on the oxidative phosphorylation process. Toxicity curves demonstrate that the sensitivity threshold of chaotic net frequencies ranged from 3.5 to 7 μg·L−1, which is highly sensitive compared with other sublethal effects of 2,4-DCP on other aquatic species. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Ecotoxicology and Environmental Safety
volume
46
issue
2
pages
207 - 217
publisher
Elsevier
external identifiers
  • scopus:0034049914
ISSN
0147-6513
DOI
10.1006/eesa.1999.1897
language
English
LU publication?
yes
id
af51c9e2-7f35-4365-bfa6-dffc16371c4b (old id 149806)
date added to LUP
2007-06-29 08:10:09
date last changed
2017-01-01 07:07:24
@article{af51c9e2-7f35-4365-bfa6-dffc16371c4b,
  abstract     = {In order to assess the potential of hydropsychid capture net anomalies as a bioindicator of chronic toxicity in streams and rivers, the effects of 2,4-dichlorophenol (2,4-DCP) exposure on the net-spinning behavior of Hydropsyche slossonae were examined for anomalies after 0, 5, 10, 15, and 20 exposure days to gradient concentration of 2,4-dichlorophenol. The net-spinning behavior was significantly affected when larvae were exposed to 1.0, 10, 25, and 50 μg·L−1, as expressed by the occurrence of two distinct abnormalities. The first one was a distortion of the midline meshes, where the normal diamond-shape structure is disrupted and the meshes are separated by extra strands (called "midline" anomaly). The second aberration observed was called "chaotic" net, where the nets are highly irregular without any real structure or well-defined areas. A good correlation was found between the chaotic net frequencies and the reduction of ATP concentrations in the larvae, indicating possible uncoupling effects of 2,4-DCP on the oxidative phosphorylation process. Toxicity curves demonstrate that the sensitivity threshold of chaotic net frequencies ranged from 3.5 to 7 μg·L−1, which is highly sensitive compared with other sublethal effects of 2,4-DCP on other aquatic species.},
  author       = {Tessier, L and Biosvert, JL and Vought, Lena and Lacoursière, Jean},
  issn         = {0147-6513},
  language     = {eng},
  number       = {2},
  pages        = {207--217},
  publisher    = {Elsevier},
  series       = {Ecotoxicology and Environmental Safety},
  title        = {Effects of 2,4-Dichlorophenol on the Net-Spinning Behavior of Hydropsyche slossonae Larvae (Trichoptera; Hydropsychidae), an Early Warning Signal of Chronic Toxicity},
  url          = {http://dx.doi.org/10.1006/eesa.1999.1897},
  volume       = {46},
  year         = {2000},
}